Cutter relieving holder



3, 1955 H. MULLER 2,715,805

CUTTER RELIEIVING HOLDER Filed June 30, 1955 0 MIN"- INVENTOK HansMuZZer ATTGRN EYS United States Patent 6 CUTTER RELIEVLIG HOLDER Hans Mailer, Astoria, N. Y.

Application June 31 1953, Serial No. 365,140

3 Claims. (Ci. 51-225) This invention relates to a tool, or accessory, and more particularly to an accessory for use on a lathe.

The object of the invention is to provide an accessory for use with a lathe whereby a counterboring tool or other instrument can be oscillated back and forth across a grinder or sharpener.

A further object of the invention is to provide a tool for mounting in a lathe whereby an instrument to be sharpened such as a cutter will be oscillated back and forth across a grinder or sharpener.

A further object of the invention is to provide an accessory for a lathe which is extremely simple and inexpensive to manufacture.

Other objects and advantages will be apparent during the course of the following description.

In the accompanying drawings, forming a part of this application, and in which like numerals are used to designate like parts throughout the same:

Figure 1 is a side elevational view showing the accessory of the present invention mounted in a lathe.

Figure 2 is a sectional view taken on the line 22 of Figure 1.

Figure 3 is a sectional view taken on the line 3-3 of Figure 1.

Figure 4 is a sectional view taken on the line 4-4 of Figure 1.

Figure 5 is a sectional view taken on the line 5-5 of Figure 2.

Figure 6 is a sectional view taken on the line 66 of Figure 1.

Referring in detail to the drawings, the numeral 10 designates a cylindrical body member which is adapted to be mounted in a conventional lathe chuck 11, and the body member 10 is provided with a longitudinally extending bore 12. Slidably and rotatably mounted in the bore 12 is a shaft 14 and extending transversely through the shaft 14 is a pin 15. The pin 15 is adapted to coact with cam surfaces 16 on the outer end of the body member 10.

A support member 17 is adapted to be mounted in the tailstock 18 of a conventional lathe, and the support member 17 may be tapered as shown in Figures 1 and 2. The support member 17 is provided with a socket 19, and slidably seated in the socket 19 is an arm 21. A coil spring 21) has one end abutting the arm 21 for normally urging the arm 21 outwardly. There is provided in the support member 17 a cut-out or recess 22, and a securing element 23 extends through the cut-out 22 and into engagement with the arm 21.

The outer end of the arm 21 is pointed as at 25 for engaging an end of the cutter 24, broken lines, and the cutter 24 is adapted to be sharpened at an angle, the sharpener or grinding tool being positioned at an angle indicated by the dotted lines 13, Figure 1. The outer end of the shaft 14 is also pointed as at 26, and the pointed end 26 is also adapted to engage the opposite end of the counterboring cutter 24 which is being sharpened.

A dog 27 is provided, and the dog 27 is arranged in 2 ,7 l 5 ,8 05 Patented Aug. 23, 1955 ice engagement with the tool 24 and also with the shaft 14. The dog 27 includes a clamp, Figure 4, and the clamp includes a pair of spaced apart legs 28 which are connected together by a securing element 29. Extending from the clamp is a finger 30, and a pin 31 pivotally connects a bracket to the finger 36, the bracket being shown in Figure 5 and including a pair of spaced apart bars 32 which straddle the tool 24,being sharpened. A suitable securing element 33 interconnects the bars 32 together.

From the foregoing it is apparent that an accessory has been provided for use with a lathe whereby a tool such as the tool 24 can be oscillated back and forth into and out of engagement with a grinder or sharpener which operates along the dotted lines 13. The body member 10 is adapted to be mounted in a suitable lathe chuck 11, and the support member 17 can be mounted in the lathe tailstock 18. The dog 27 connects the shaft 14 to the tool 24. The work or tool 24 may be turned by hand. The accessory can be removed from the lathe when it is not being used so that it is a portable unit. The tool '24 may be a forming cutter and when the cutter is revolved, the cutter will be ground at the proper angle. The shaft 14 revolves freely in the body member 10 and the outer face of the body member 10 is provided with cam surfaces 16 so that the pin 15 will cause the shaft 14 to slide back and forth in the body member 10 whereby the cutter 24 will be oscillated or reciprocated. The body member 10 is held stationary in the lathe chuck 11, and the shaft 14 is rotated and this rotation is translated into reciprocation due to the pin and coacting cam surfaces.

The tapered support member 17 is mounted in the tailstock 18, and the pin 23 in the recess 22 prevents the arm 21 from moving all the way out of the support member 17. The work piece or tool to be sharpened 24 is held by the dog 27 between the pointed ends 25 and 26.

When the tool 24 is turned, the spring 20 maintains tension on the tool 24 between the two pointed ends so that by turning the work manually, the pin 15 will ride on the cam surfaces 16 to move the tool 24 back and forth across the grinder or sharpener. The accessory can be used when sharpening any rotary cutting tool. It is to be understood that any number of cams may be used with the present invention.

1 claim:

1. In combination, a lathe including a chuck and a tailstock, a cylindrical body member mounted in said lathe chuck and provided with a longitudinally extending bore, a shaft slidably and rotatably mounted in said bore and having an outer pointed end engaging a cutter to be sharpened, a pin extending transversely through said shaft, cam surfaces on the outer end of said body member abutting said pin, a tapered support member spaced from said body member and mounted in said lathe tailstock, said support member being provided with a socket, a cylindrical arm slidably mounted in said socket and having an outer pointed end projecting beyond the end of said support member and engaging the cutter, a coil spring positioned in said socket and abutting the inner end of said arm, there being a cut-out in said support member,

1 a securing element extending through said cut-out and into engagement with said arm, and a dog arranged in engagement with said cutter and shaft.

2. The apparatus as described in claim 1, wherein said dog comprises a clamp mounted on said shaft and including a pair of spaced apart legs, a securing element interconnecting said legs together, a finger extending from said clamp, a bracket pivotally connected to said finger and including a pair of spaced apart bars straddling said cutter, and a securing element interconnecting said bars together.

3. In combination, a lathe including a chuck and a tailstock, a cylindrical body member mounted in said lathe chuckan'd provided witha longitudinally extending bore, a shaft slidably and rotatably mounted in said bore and having an outer pointed end engaging a cutter to be sharpened, said being longer than said body memei ten dihg 'ly thron ghsaid shaftycarn 5 surfaces 'b'nth'e d'ute'r end of aid b0213 member abuttin i ber's-paaea ffain' said Body H lath e 'tails'tock, the am-er end bf'said i A fl tern than the Inner end thereof, "said suppofr't ifiember beih g 10 p'r'biided with aay mdmn aim slidably gleaned aze qt an arm 1 3;? ifi i f il s E fiie'lit With said cutter and shaft, said 'dog having a sub- 20 stantially U-shape and comprising a clamp mounted on said shaft and including a pair of spaced apart'legs straddling said body member, a securing element interconnect ing said legs together, a finger extending at right angles from said clamp, and a bracket pivotally connected to said finger and including a pair of spaced apart bars strad-' dling said cutter, said bars including an intermediate outwardly olfset portion, and a securing element interconnecting said bars together.

References Cited in the file of this patent UNITED STATES PATENTS 

